Ambient or specific conductivity?

Of all the environmental variables which affect electrofishing success, the one for which the most is known, and indeed it has been said is the most important, is water conductivity. This article explores the how and why of conductivity in electrofishing.
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Standardising by power II

You can use this worksheet to apply your data collected in Standardising By Power I.Continue Reading..

Standardising by power I

Finding minimum power (voltage and current) levels for effective, successful electrofishing at a sampling site is important for several reasons.

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Increasing capture efficiency and sampling precision

As an experienced user, your methodological aims likely include:

  1. develop and standardize species ‘x’ sampling protocols; and,
  2. collect more accurate and precise data to characterize species ‘x’ populations.

If this is the case the Framework for Increasing Capture Efficiency and Sampling Precision is for you. This tool provides a recipe for improving your electrofishing.

The PDF references several Excel worksheets developed by Jan Dean. They can be downloaded on this resources page.

 

Electrode resistance procedures

This document provides guidance for making electrode measurements on various gear types, using an external power source and an internal power source.Continue Reading..

How to make a voltage gradient probe

A voltage gradient probe is used to measure and map electrical fields produced by electrofishing units. It can be a valuable tool for assessing and standardising electrofishing equipment.

Download the PDF file with detailed DIY instructions.

 

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